检索结果-内蒙古大学图书馆

Negotiating Strict Latency Limits for Dynamic Real-Time Services in Vehicular Time-Sensitive Networks

学校读者我要写书评

暂无评论

arXiv 2025年

作者： Häckel, Timo Maile, Lisa Meyer, Philipp Korf, Franz Schmidt, Thomas C. Faculty of Computer Science Dresden University of Technology Dresden01187 Germany Department of Computer Science Hamburg University of Applied Sciences Hamburg20099 Germany Institute of Computer and Network Engineering Technische Universität Braunschweig Braunschweig38106 Germany

Future vehicles are expected to dynamically deploy in-vehicle applications within a Service-Oriented Architecture (SOA). Critical services operate under hard real-time constraints, which Time-Sensitive Networking (TSN) complements on the in-vehicle Ethernet layer. TSN ensures deterministic communication between critical services and its Credit-Based Shaper (CBS) supports dynamic resource reservations. However, the dynamic nature of service deployment challenges network resource configuration, since any new reservation may change the latency of already validated flows. In addition, standard methods of worst-case latency analysis for CBS have been found incorrect, and current TSN stream reservation procedures lack mechanisms to signal application layer Quality-of-Service (QoS) requirements or verify deadlines. In this paper, we propose a QoS negotiation scheme within the automotive SOA that interacts with the TSN network controller to reserve resources while ensuring latency bounds. We comparatively evaluate reservation schemes using worst-case analysis and simulations of a realistic In-Vehicle Network (IVN) for demonstrating their impact on QoS guarantees, resource utilization, and setup times. We find that only a reservation scheme utilizing per-queue delay budgets and network calculus provides valid configurations and guarantees acceptable latency bounds throughout the IVN. The proposed service negotiation mechanism efficiently establishes 450 vehicular network reservations in just 11 ms. Copyright © 2025, The Authors. All rights reserved.

关键词： Time division multiple access

Advanced Predictive Modeling of Military PTSD: SCA-Guided LSTM Analysis

学校读者我要写书评

暂无评论

Advanced Predictive Modeling of Military PTSD: SCA-Guided LS...

Intelligent Systems and Advanced Applications (ICISAA), International Conference on

作者： Megha Sawangikar Chinmaya Dash S. Surekha Veera Ankalu Vuyyuru Pkp Gaitry Chopra R Saravanakumar Department of Applied Chemistry Yeshwantrao Chavan College of Engineering Nagpur Maharashtra India Department of Computer Science St. Claret College Autonomous Bangalore India Affiliated to JNTUH Ghatkesar Vignana Bharathi Institute of Technology(Autonomous) Hyderabad India Department of CSE Koneru Lakshmaiah Education Foundation Vaddeswaram Andhra Pradesh India Department of Applied Chemistry Faculty of Engineering and Technology DMIHER Wardha Maharashtra Department of ECE Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai India

ISBN: (数字)9798331539948

ISBN: (纸本)9798331539955

Military personnel frequently suffer from posttraumatic stress disorder (PTSD), a complicated mental health illness brought on by their exposure to terrible experiences during combat operations. For prompt assistance and intervention, it is essential to anticipate and comprehend the onset of PTSD. This study suggests a unique method for combining the LSTM network with the Sine Cosine Algorithm (SCA) for enhanced predictive modelling of military PostTraumatic Stress Disorder (PTSD). PTSD is a common mental health issue that affects military people, frequently stemming from their exposure to traumatic events that occurred during war. For PTSD to be effectively managed and treated, early recognition and intervention are essential. Due to the disorder’s complexity and dynamic nature, traditional predictive modelling tools frequently encounter difficulties in effectively predicting the onset of PTSD. The approach is a methodical procedure that starts with gathering data on PTSD from military members and ends with pre-processing the data using Z-score normalisation. The SCA method is then utilised to extract pertinent characteristics, which makes it possible to identify important patterns associated with PTSD. These features are utilized as input for a SCA-LSTM model, which combines the advantages of both algorithms to predict PTSD with accuracy. Experiments on a sizable dataset of military soldiers show that the suggested method is highly accurate in predicting the onset of PTSD with recall rates and precision. The increased prediction accuracy and robustness of the SCA-LSTM framework are demonstrated by comparative comparisons with baseline models. The performance and accuracy ($\mathbf{9 7 \%}$) of the prediction model are assessed by comprehensive model evaluation, guaranteeing its dependability in diagnosing PTSD patients. This research provides possible possibilities for improving mental health outcomes within this group by highlighting the need of utilising advance

关键词： Accuracy Mental health Predictive models Prediction algorithms Feature extraction Robustness Complexity theory Personnel Intelligent systems Long short term memory

DROPLET MOTION WITH CONTACT-LINE FRICTION: LONG-TIME ASYMPTOTICS IN COMPLETE WETTING

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Giacomelli, Lorenzo Gnann, Manuel V. Peschka, Dirk SBAI Department Sapienza University of Rome Via A. Scarpa 16 Roma00161 Italy Delft Institute of Applied Mathematics Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 Delft2628 CD Netherlands Weierstrass Institute Mohrenstrasse 39 Berlin10117 Germany

We consider the thin-film equation for a class of free boundary conditions modelling friction at the contact line, as introduced by E and Ren. Our analysis focuses on formal longtime asymptotics of solutions in the perfect wetting regime. In particular, through the analysis of quasi-self-similar solutions, we characterize the profile and the spreading rate of solutions depending on the strength of friction at the contact line, as well as their (global or local) corrections, which are due to the dynamical nature of the free boundary conditions. These results are complemented with full transient numerical solutions of the free boundary *** Codes 35C06, 35K65, 76M10, 76A20 Copyright © 2023, The Authors. All rights reserved.

关键词： Friction

Thermal cycling effect on the crack formation of solder joint in ball grid array package

学校读者我要写书评

暂无评论

Thermal cycling effect on the crack formation of solder join...

International Conference on Electronic and Advanced Materials 2021, ICEAM 2021

作者： Suhaimi, M.F. Abu Bakar, M. Jalar, A. Che Ani, F. Ramli, M.R. Western Digital® SanDisk Storage Malaysia SDN.Bhd. Plot 301A Persiaran Cassia Selatan 1 Taman Perindustrian Batu Kawan MK13 Batu Kawan Seberang Perai Selatan Penang14100 Malaysia Institut of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Bangi Selangor43600 Malaysia Department of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Selangor43600 Malaysia

Ball grid array (BGA) technology is one of the technologies used in surface mount technology (SMT). It provides many interconnection points via the solder ball and thus give advantages such as good heat dissipation, improved the PCB design, BGA package become robust and reliable. In electronic industry, the reliability of BGA package is being concerned. Thermal cycling test (TCT)is one of typical reliability test used to investigate the reliability of the BGA package. This study investigates on the thermal cycling effect on the crack formation of solder joint in ball grid array package. The BGA package was subjected to thermal cycle test with temperature cyclic of -40°C and 85°C for 500, 750 and 1000 cycles. The finding shows that the cracks were observed in solder joint in 750 and 1000 cycles. This shows that the BGA package is sensitive to the thermal cycling and effect its reliability. The package was modified with adding underfill materials and tested through the same cycles. Cross sectional and Dye and pry test show no crack formation and dye penetration for all thermal cycles in the BGA package with underfill. © Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.

关键词： Thermal cycling

Structural Modification and Conductivity Enhancement of Nicl2 Incorporated P3ht: Pc60bm Based Organic Photoactive Layer

学校读者我要写书评

暂无评论

SSRN

SSRN 2023年

作者： Tan, Sin Tee Hong, Kai Jeat Rizal, Nur Elmira Melissa Binti Hilmi Lau, Kam Sheng Yap, Chi Chin Chia, Chin Hua Chong, Kok-Keong Department Physics Universiti Putra Malaysia UPM Serdang 43400 Malaysia Institute of Nanoscience and Nanotechnology Universiti Putra Malaysia UPM Serdang Darul Ehsan Selangor43400 Malaysia Department of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia UKM Bangi Selangor43600 Malaysia Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul Rahman Jalan Sungai Long Bandar Sungai Long Kajang Selangor43000 Malaysia HELP Matriculation Centre HELP University Kuala Lumpur Malaysia

The poor crystalline structure in P3HT has limited the device performance of organic photovoltaic. Surface modification of P3HT has been reported to enhance the intrinsic properties of the molecular structure. This project focus on the incorporation of NiCl2 at different volume percentages into P3HT: PC60BM active material. The structural, electrical, and optical properties of the active material after the metal halide modification is elucidated. The result showed that the 20 vol% of NiCl2 sample present 45% increment in its electrical conductivity and 37% in the photoabsorbance ability. The presence of NiCl2 can served as a surface passivation to reduce the moisture level in P3HT which indirectly improve the surface activity of P3HT based active material. This novel finding can serve as an alternative to improve the device performance of P3HT based active material in organic solar cell fabrication. © 2023, The Authors. All rights reserved.

关键词： Passivation

Band structure engineering using a moiré polar substrate

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Wang, Xirui Xu, Cheng Aronson, Samuel Bennett, Daniel Paul, Nisarga Crowley, Philip J.D. Collignon, Clément Watanabe, Kenji Taniguchi, Takashi Ashoori, Raymond Kaxiras, Efthimios Zhang, Yang Jarillo-Herrero, Pablo Yasuda, Kenji Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA02138 United States Kavli Institute of Theoretical Physics University of California Santa Barbara Santa BarbaraCA93106 United States Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Department of Physics Harvard University CambridgeMA02138 United States Min H. Kao Department of Electrical Engineering and Computer Science University of Tennessee KnoxvilleTN37996 United States School of Applied and Engineering Physics Cornell University IthacaNY14850 United States

Applying long wavelength periodic potentials on quantum materials has recently been demonstrated to be a promising pathway for engineering novel quantum phases of matter. Here, we utilize twisted bilayer boron nitride (BN) as a moiré substrate for band structure engineering. Small-angle-twisted bilayer BN is endowed with periodically arranged up and down polar domains, which imprints a periodic electrostatic potential on a target two-dimensional (2D) material placed on top. As a proof of concept, we use Bernal bilayer graphene as the target material. The resulting modulation of the band structure appears as superlattice resistance peaks, tunable by varying the twist angle, and Hofstadter butterfly physics under a magnetic field. Additionally, we demonstrate the tunability of the moiré potential by altering the dielectric thickness underneath the twisted BN. Finally, we find that near-60°-twisted bilayer BN provides a unique platform for studying the moiré structural effect without the contribution from electrostatic moiré potentials. Tunable moiré polar substrates may serve as versatile platforms to engineer the electronic, optical, and mechanical properties of 2D materials and van der Waals heterostructures. Copyright © 2024, The Authors. All rights reserved.

关键词： Substrates

A generalized Stokes system with a nonsmooth slip boundary condition

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Zhao, Jing Migórski, Stanislaw Dudek, Sylwia College of Sciences Beibu Gulf University Guangxi Qinzhou535000 China Jagiellonian University in Krakow Optimization and Control ul. Lojasiewicza 6 Krakow30348 Poland Department of Applied Mathematics Faculty of Computer Science and Telecommunications Krakow University of Technology ul. Warszawska 24 Krakow31155 Poland

A class of quasi-variational-hemivariational inequalities in reflexive Banach spaces is studied. The inequalities contain a convex potential, a locally Lipschitz superpotential, and an implicit obstacle set of constraints. Results on the well posedness are established including existence, uniqueness, dependence of solution on the data, and the compactness of the solution set in the strong topology. The applicability of the results is illustrated by the steady-state Stokes model of a generalized Newtonian incompressible fluid with a nonmonotone slip boundary *** Codes 35J66, 35J87, 47J20, 49J40, 76D05 © 2023, CC BY.

关键词： Boundary conditions

Deep Learning Approach for Complex Activity Recognition using Heterogeneous Sensors from Wearable Device

学校读者我要写书评

暂无评论

Deep Learning Approach for Complex Activity Recognition usin...

2021 Research, Invention, and Innovation Congress: Innovation Electricals and Electronics, RI2C 2021

作者： Hnoohom, Narit Jitpattanakul, Anuchit You, Ilsun Mekruksavanich, Sakorn Mahidol University Image Information and Intelligence Laboratory Department of Computer Engineering Faculty of Engineering Nakhon Pathom Thailand King Mongkut's University of Technology North Bangkok Intelligent and Nonlinear Dynamic Innovations Research Center Department of Mathematics Faculty of Applied Science Bangkok Thailand Soonchunhyang University Department of Information Security Engineering Asan31538 Korea Republic of University of Phayao School of Information and Communication Technology Department of Computer Engineering Phayao Thailand

ISBN: (纸本)9781665403009

The classification of simple and complex sequences of operations is made easier according to the use of heterogeneous sensors from a wearable device. Sensor-based human activity recognition (HAR) is being used in smartphone platforms for elderly healthcare monitoring, fall detection, and inappropriate behavior prevention, such as smoking habit, unhealthy eating, and lack of exercise. Common machine learning and deep learning techniques have recently been presented to tackle the HAR issue, with a focus on everyday activities, particularly general human activities including moving, sitting, and standing. However, there is an intriguing and challenging HAR research subjects involving more complicated psychological activities in various environments, including smoking, eating, and drinking. The use of heterogeneous sensor data to enhance recognition performance over sensor-based deep learning networks is considered in this work. We demonstrate that using a combination of two inertial measurement units outperforms employing either an accelerometer or a gyroscope by utilizing four deep learning classifiers to recognize complex human activity (CHA). Furthermore, we describe the impact of five window sizes (5s - 40s) on a publicly accessible benchmark dataset and how increasing window size effects to the classification performance of CHA deep learning networks. © 2021 IEEE.

关键词： Deep learning

Testing the Pauli Exclusion Principle and fundamental symmetries with the VIP underground experiment 9

学校读者我要写书评

暂无评论

Testing the Pauli Exclusion Principle and fundamental symmet...

9th Symposium on Prospects in the physics of Discrete Symmetries, DISCRETE 2024

作者： Napolitano, Fabrizio Bazzi, Massimiliano Bortolotti, Nicola Bragadireanu, Mario Cargnelli, Michael Clozza, Alberto De Paolis, Luca Del Grande, Raffaele Guaraldo, Carlo Iliescu, Mihail Laubenstein, Matthias Manti, Simone Marton, Johann Piscicchia, Kristian Porcelli, Alessio Scordo, Alessandro Sgaramella, Francesco Sirghi, Diana Laura Sirghi, Florin Zmeskal, Johann Curceanu, Catalina Laboratori Nazionali di Frascati Istituto Nazionale di Fisica Nucleare Via Enrico Fermi 54 Frascati00044 Italy Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi" Via Panisperna 89 A Rome00184 Italy Physics Department "Sapienza" University of Rome Piazzale Aldo Moro 5 Rome00185 Italy IFIN-HH Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubei 30 Reactorului Măgurele077125 Romania Stefan-Meyer-Institute for Subatomic Physics Austrian Academy of Science Wiesingerstraße 4 Wien1010 Austria Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague Břehová 7 Prague115 19 Czech Republic Laboratori Nazionali del Gran Sasso Istituto Nazionale di Fisica Nucleare Via G. Acitelli 22 Assergi67100 Italy Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University ul.prof.Stanislawa Lojasiewicza 11 Kraków30-348 Poland Centro de Investigación Tecnología Educación y Vinculación Astronómica Universidad de Antofagasta Avenida Angamos 601 Antofagasta1240000 Chile

The Pauli Exclusion Principle (PEP) is a fundamental pillar of quantum theory. Potential violations of PEP could indicate physics beyond the Standard Model, including existence of extra dimensions, Lorentz invariance violations, or non-commutative space-time geometries. The VIP Collaboration conducts high precision X-ray spectroscopy experiments at INFN’s Gran Sasso Underground National Laboratory to search for atomic transitions that violate PEP. The current VIP-2 experiment, using copper as target material, aims to improve the exclusion limit for PEP violation to β2/2 −31, enhancing the previous constraint by two orders of magnitude. We present our main experimental results so far, and introduce the upcoming experimental upgrade. Additionally, we discuss the VIP-Lead experiment, which specifically explores PEP violations in lead atoms within the context of Non-Commutative Quantum Gravity frameworks. © Copyright owned by the author(s)

关键词： Quantum theory